Pressure-transmitter.



PATENTED AUG. 2, 1904.

L. L. PRESGOTT. PRESSURE TRANSMITTER.

APPLICATION FILED MAY 7. 1904.

NO MODEL.

Q! IIIIIIIII n s# IIIIIII'I s Illil ullllllllll Patented August 2, 1904.

LOREN L. PRESCOTT, OF MARINETTE, IVISCONSIN.

PRESSURE-TRANSMITTER.

SPECIFICATION forming part of Letters Patent No. 766,287, dated August2, 1904. Application filed May 7, 1904. Serial No. 206,859. (No model.)

To all whom t may concern:

Be it known that I, LoREN L. PRESCOTT, a citizen of the United States,Aand a resident of Marinette, county of Marinette, and State ofVisconsin, have invented certain new and useful Improvements inPressure-Transmitters, of which the following is a specification, andwhich are illustrated in the accompanying' drawings, forming a partthereof.

This invention relates to fluid -pressuretransmitting devices of thetelescopic type and adapted for use in conveying fluid-pressure from astationary source of supply to a movable translating' device.

The present invention is an improvement upon the transmitter for whichLetters Patent No. 658,220 were granted to me September 18, 1900; andthe object of the invention is to provide more efliciently forpreventing' wear upon the movable or telescoping member of thetransmitter.

It consists in a transmitter having located within its stationary memberone or more antifriction-rollers, upon which the entering' member mayride, and more specitically of couplings for uniting' sections of thestationary member and provided with pockets within which suchantifriction-rollers may be housed.

The invention is illustrated in the accompanying drawings, in whichFigure 1 is a detail longitudinal view, partly in elevation and partlyin section, of the improved transmitter; and Fig. 2 is a transversesection on the line 2 2 of Fig. 1.

The device comprises two pipes, the one adapted to be stationary and tolead from the source of pressure and the other to be attached to themoving translator-*such for example, as a motor located on asawmill-carriage. The larger or stationary member is preferably composedof a plurality of sections, as 10 and 11, united by a coupling 12, intowhich the sections of the pipe are screwed. The coupling 12 is providedwith an internal pocket 13, projecting' downwardly, within which ishoused an antifriction-roller 14, carried by a shaft 15, set in suitableapertures in the side walls of the pocket.

For convenience in assembling, the apertures for carrying the shaft 15may be formed by drilling entirely through one of the side walls of thepocket and into the inner face of the opposite wall and after the shafthas been inserted filling' the outer end of the initial aperture by aplug 16. The roller 1-1 is of course dropped into the pocket 18 beforethe pin is inserted, so that the latter may pass through its eye. Thediameter of the roller 15 is such that its periphery, which ispreferably annularly grooved, extends into the chamber of the coupling19. and carries the telescoping member 17 of the transmitter, whichenters the stationary member through a stuing-box 18,`applied to the endthereof.

The member 17 is turned up to a smooth su rface and slides through thestufling-box, and in the practice heretofore prevailing its inner endhas either dragged on the bottom of the stationary member or, as in thecase of the structure shown by my earlier patent, has been carried bythe couplings uniting the Several sections of this member of thetransmitter.

The present invention provides for the elimination of practically all ofthe friction from the moving member of the transmitter except at thestufling-box, and thus prevents wear.

I claim as my invention- 1. In combination, a pair of telescoping pipes,the outer pipe having a stuHing-box surrounding the inner pipe, and atubular block intermediate of its ends provided in its bore with anantifriction-roller.

2. In combination, a pair of telescoping pipes, 'the outer pipe beingsectional, and a coupling uniting adjacent sections, and anantifriction-roller located within the bore of the coupling for carryingthe inner pipe.

3. In combinatiomasectional pipe, a coupling uniting adjacent sectionsand having an internal pocket, a I'oller journaled within the pocket,its periphery extending into the bore of the coupling', and a pipetelescopically entering the sectional pipe.

LOREN L. PRESCOTT. l/Vitnesses:

JAMES A. HAMILTON, RAY H. SMEAD.

